I have a Cadillac deville 1998 v8 northstar. I had my alternator rebuilt and got a new battery. Vehicle started once but dash read battery not charging. Took vehicle to O'Riellys Battery tested bad. H

I have a Cadillac deville 1998 v8 northstar. I had my alternator rebuilt and got a new battery. Vehicle started once but dash read battery not charging. Took vehicle to O'Riellys Battery tested bad. Had to get a jump to start vehicle. Replaced battery with warranty. Tried to start vehicle w new battery, vehicle wouldn't start. However dash lights and lights came on. It read across dash theft security problem, vehicle may not restart. What could this problem be?

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Hi, I can't tell you exactly what is wrong because there is too much involved at this point, what with 2 shops working with it, but I can give you some advise on what else to check. On the alternators and the wiring that supports them a small volt charge is taken off one of the slip rings, where the brushes ride, for the purpose of turning out the light. As I remember, this is a yellow wire that runs back to the dash.

To the alternator, it would be one of the wires that plug into the side of the alternator case.
jetski

check the fuses in the POWER DISTRIBUTION BOX under the hood, There is a 75A in-line fuse and #11 - 15A fuse see if they are good.... test your alt. loom for opens, and cables .....hope this helps...GL

it depends on how old the alternator is because this happend to a car that came into the shop that i work at if the alternator is brand new than u need a new battery but if the battery and the laternator are brand new than u might need spark plugs or new wireing

MY NA ME IS MAGICBROOM58, HAVE YOU TRIED .. I THINK IT'S ON THE FIRE WALL PASS. SIDE (CILINOID) TAKE THE RBBER OFF THE POS. AND TURN YOUR EGNITION OVER TO THE ON POS. GO BACK UNDER YOUR HOOD AND TAKE A RUBBER HANDLED WRECH?SCREW DRIVER AND CONNECT THE 2 POINTS IF IT TURNS OVER U FOUND YOUR PRBLEM

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Usually it means the computer is not accepting the chip in your key.It can be the key, the sensor in the lock cylinder, or something in the security module or computer.You might try another key or lock and unlock the driver's door with the key.

the heater core in a 1998 Cadillac is very tricky to replace.start with getting a pressure test to determine where the exact location of the leak is, it may not be the heater core.if you do decide to pull the dash apart to change the core make sure the battery is disconnected for at least an hour to allow the airbag system to discharge.

Sounds like a faulty voltage regulator to me.Start the car and take a multimeter and check voltage coming out of the alternator it should be 14-14.6 volts if its not within these specs take alternator back and get a new one.

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This should be the firing order;2004 Northstar RWD/AWD 4.6L V8 (LH2) ...Firing Order: 1-2-7-3-4-5-6-8Please be sure that when you list your questions on auto's be more precise on info provided. Sometimes listing the Vin Engine number helps to to locate info. Good Luck!